Hanna hypothesizes that granite is denser than sandstone. How can Hanna test her hypothesis?

Answers

Answer 1

Answer: To test if the hypothesis is correct, a good way is to think of it this way:
Density = mass/volume, right?
Calculate the mass and volume of each and do the equation; this will test your hypothesis.
You will be left with the density of each. But, make sure that the sample sizes are the same (controlled variable) otherwise it will be an unfair test.

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Why would an electrician use parallel circuits to wire the lights in each room of a house instead of using a series circuit?A. When electricians get their license, they are only licensed to install parallel circuits. Most electricians aren't certified to install series circuits. B. Parallel circuits prevent electrons from flowing if part of the circuit is broken and therefore prevent fires. Series circuits cause more fires because electrons still flow. C. Electrons continue to flow in a parallel circuit even if part of the circuit is broken. In a series circuit, a break such as a burned out lightbulb would cause the current to stop in the whole room. D. Parallel circuits are much easier to wire and are required by the electrical code for housing construction in most communities. Series circuits are sometimes used with special approval.
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What two gasses can cause changes in a muds pH?

Answers

The two gases that can cause changes in a mud's pH are carbon dioxide (CO2) and hydrogen sulfide (H2S). These gases can dissolve in water and form acids, leading to a decrease in pH.

The specific heat of water is 4.18 J/(g * °C) How much heat, in kilojoules, must be added to 250 g of water to increase the temperature of the water by 5.0°C?

Answers

You need to use the equation q=mcΔT.
q=the heat absorbed or released
m= the mass of the sample (in this case 250g)
c=the specific heat of the sample (in this case 4.18J/g°C)
ΔT=the change in temperature (in this case 5°C)
When you plug every thing in you should get q=5225J or 5.225kJ

I hope this helps. Let me know if anything is unclear.

Each sheet of metal on a roof is parallel to the rest of the sheets of metal. If the first sheet of metal is perpendicular to the top line of the roof, what can you conclude about the rest of sheets of metal? Justify your answer.a. The sheets of metal are all perpendicular to the top line of the roof by the Alternate Interior Angles Theorem.
b. The sheets of metal are all perpendicular to the top line of the roof by the Transitive Property of Parallel Lines.
c. The sheets of metal are all perpendicular to the top line of the roof by the Converse of the Same-Side Interior Angles Theorem.

Answers

B.

Because all of the lines are parallel, and the top line is perpendicular to them, all of the lines are perpendicular to the top line due to the transitive property of parallel lines.

Answer:

b. The sheets of metal are all perpendicular to the top line of the roof by the Transitive Property of Parallel Lines.

You would predict that iodized salt would have no effect on any cases of ____________.

Answers

The body's main requirement of iodine is in the thyroid gland. Therefore, iodized salt would have no effect on any cases of Graves' disease as the thyroid gland is already overactive in this disease.

Iodized salt does not have any effect on any cases of Graves' diseases.

How do I calculate the density of benzene if 0.10L has a mass of 36.4g

Answers

You multiply them together so it would be 3.64

Within each energy level there are different sublevels that are created. Those electrons that have the lowestamount of energy follow paths that are spherical in shape. Which sublevel is associated with this shape?
A)
d.
B)
f
C)
р
D)
S

Answers

It’s option D cause we know that S orbital is spherical

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